I have had this monitor for a while now as a main gaming screen and it's been great but I have always ran it at 280Hz 8bit on Displayport.
The screen supports 10bit (8bit+FRC) and HDR10 which I use in some games like Far Cry 6, Shadow of the Tomb Raider, Division 2... However, on 8 bit 280Hz I could notice some pretty obvious color banding in skies, lighting and shadows. So I tested it on Gradient (banding) - Lagom LCD test and on 280Hz...
VG279QM 144Hz 10bit (8bit+FRC) vs 280Hz 8bit
The screen supports 10bit (8bit+FRC) and HDR10 which I use in some games like Far Cry 6, Shadow of the Tomb Raider, Division 2... However, on 8 bit 280Hz I could notice some pretty obvious color banding in skies, lighting and shadows. So I tested it on Gradient (banding) - Lagom LCD test and on 280Hz...
VG279QM 144Hz 10bit (8bit+FRC) vs 280Hz 8bit